package com.itheima.reggie.config;

import com.itheima.reggie.common.JacksonObjectMapper;
import com.itheima.reggie.interceptor.ReggieInterceptor;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import java.util.ArrayList;
import java.util.List;

/**
 * web层配置类
 */
@Configuration
public class ReggieWebMvcConfiguration implements WebMvcConfigurer {
    @Autowired
    private ReggieInterceptor reggieInterceptor;

    /**
     * 配置拦截器
     * @param registry
     */
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        List<String> list= new ArrayList<>();
        list.add("/backend/**");
        list.add("/error");
        list.add("/employee/login");
        list.add("/employee/logout");

        registry.addInterceptor(reggieInterceptor)  //注册拦截器
                .addPathPatterns("/**")             //拦截所有路径
                .excludePathPatterns(list);         //放行指定路径
    }

    /**
     * 设置静态资源映射
     * @param registry
     */
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        //当访问请求是/backend/**时,去classpath:/backend/寻找对应资源
        registry.addResourceHandler("/backend/**")
                .addResourceLocations("classpath:/backend/");
    }

    //扩展mvc框架的消息转换器,id精确度的解决方法
    public void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
        //创建消息转换器对象
        MappingJackson2HttpMessageConverter messageConverter = new MappingJackson2HttpMessageConverter();
        //设置对象转换器，底层使用Jackson将Java对象转为json
        messageConverter.setObjectMapper(new JacksonObjectMapper());
        //将上面的消息转换器对象追加到mvc框架的转换器集合中
        converters.add(0, messageConverter);
    }
}
